Extrapolation

F-stop

Field of view

Filter

Optical component that removes some light, either to lower intensity (neutral filters) or to change the light spectrum (colored filters).

Flare

Optical artifact coming from reflection on lenses, usually visible with a bright light source (such as the sun). Can lead to “ghosts” of the light source or “veiling glare” (loss of contrast) that creates a foggy effect on the image.

Focal plane

Plane perpendicular to the optical axis at which an object at infinity is in focus.

Focus distance

Distance at which objects are in focus.

Frame, framing

Choosing the part of a scene that is visible in a photo.

Full-field sensors

By reference to silver-halide photography, sensors whose dimensions are 36x24mm.